[Letter from I. H. Kempner to Ens. and Mrs. James C. Kempner, November 2, 1962], letter, November 2, 1962; (https://texashistory.unt.edu/ark:/67531/metapth1508406/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .